Something I found today here in a certain collection of quotations by the Buddha, called the Dhammapada, translation by Venerable Thanissaro Bhikkhu:
137-140. Whoever, with a rod, harasses an innocent man, unarmed, quickly falls into any of ten things: harsh pains, devastation, a broken body, grave illness, mental derangement, trouble with the government, violent slander, relatives lost, property dissolved, houses burned down. At the break-up of the body this one with no discernment, reappears in hell.
The point is: violence and anger not only hurt other people, they also hurt the person who did it too.
P.S. Tried posting this quote on Twitter earlier, but it was too long.